All Categories
  • All Categories
  • Accessories
  • Accessories & More
  • Butters & Eggs
  • Camera & Video
  • Mornitors
  • Tablets
  • Laptops
  • Handbags
  • Headphone & Speaker
  • Herbs & botanicals
  • Vegetables
  • Shop
  • Laptops & Desktops
  • Watchs
  • Electronic
standards@synzeal.com
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • Q
  • R
  • S
  • T
  • U
  • V
  • W
  • X
  • Y
  • Z

Pharmaceutical Reference Standards

Sildenafil

Picture of Sildenafil
CAT No: SZ-S006000
CAS No: 139755-83-2
Mol.F. : C22H30N6O4S
Mol.Wt. : 474.6
Inv. Status: In Stock
SZ-S006000
CAS No:139755-83-2
Mol.F.: C22H30N6O4S
Mol.Wt.: 474.6
Inv. Status: In Stock

Amino Sildenafil

Picture of Amino Sildenafil
CAT No: SZ-S006001
CAS No: 319491-68-4
Mol.F. : C18H23N5O4S
Mol.Wt. : 405.5
Inv. Status: Custom Synthesis
SZ-S006001
CAS No:319491-68-4
Mol.F.: C18H23N5O4S
Mol.Wt.: 405.5
Inv. Status: Custom Synthesis

Sildenafil EP Impurity A

Picture of Sildenafil EP Impurity A
CAT No: SZ-S006002
CAS No: 1391053-95-4
Mol.F. : C23H32N6O4S
Mol.Wt. : 488.6
Inv. Status: In Stock
SZ-S006002
CAS No:1391053-95-4
Mol.F.: C23H32N6O4S
Mol.Wt.: 488.6
Inv. Status: In Stock

Sildenafil EP Impurity B

Picture of Sildenafil EP Impurity B
CAT No: SZ-S006003
CAS No: 1094598-75-0
Mol.F. : C22H30N6O5S
Mol.Wt. : 490.6
Inv. Status: In Stock
SZ-S006003
CAS No:1094598-75-0
Mol.F.: C22H30N6O5S
Mol.Wt.: 490.6
Inv. Status: In Stock

Sildenafil EP Impurity C

Picture of Sildenafil EP Impurity C
CAT No: SZ-S006004
CAS No: 139755-91-2
Mol.F. : C20H26N6O4S
Mol.Wt. : 446.5
Inv. Status: In Stock
SZ-S006004
CAS No:139755-91-2
Mol.F.: C20H26N6O4S
Mol.Wt.: 446.5
Inv. Status: In Stock

Sildenafil EP Impurity D

Picture of Sildenafil EP Impurity D
CAT No: SZ-S006005
CAS No: 1357931-55-5
Mol.F. : C17H20N4O5S
Mol.Wt. : 392.4
Inv. Status: In Stock
SZ-S006005
CAS No:1357931-55-5
Mol.F.: C17H20N4O5S
Mol.Wt.: 392.4
Inv. Status: In Stock

2-Ethoxybenzoyl Chloride Impurity

Picture of 2-Ethoxybenzoyl Chloride Impurity
CAT No: SZ-S006006
CAS No: 42926-52-3
Mol.F. : C9H9ClO2
Mol.Wt. : 184.6
Inv. Status: In Stock
SZ-S006006
CAS No:42926-52-3
Mol.F.: C9H9ClO2
Mol.Wt.: 184.6
Inv. Status: In Stock

Sildenafil Amino Amide Impurity

Picture of Sildenafil Amino Amide Impurity
CAT No: SZ-S006007
CAS No: 139756-02-8
Mol.F. : C8H14N4O
Mol.Wt. : 182.2
Inv. Status: In Stock
SZ-S006007
CAS No:139756-02-8
Mol.F.: C8H14N4O
Mol.Wt.: 182.2
Inv. Status: In Stock

Sildenafil Carboxylic Acid Impurity

Picture of Sildenafil Carboxylic Acid Impurity
CAT No: SZ-S006008
CAS No: 147676-78-6
Mol.F. : C18H20N4O4
Mol.Wt. : 356.4
Inv. Status: Custom Synthesis
SZ-S006008
CAS No:147676-78-6
Mol.F.: C18H20N4O4
Mol.Wt.: 356.4
Inv. Status: Custom Synthesis

Sildenafil Chloroacetyl Impurity

Picture of Sildenafil Chloroacetyl Impurity
CAT No: SZ-S006009
CAS No: 1058653-74-9
Mol.F. : C19H21ClN4O3
Mol.Wt. : 388.9
Inv. Status: Custom Synthesis
SZ-S006009
CAS No:1058653-74-9
Mol.F.: C19H21ClN4O3
Mol.Wt.: 388.9
Inv. Status: Custom Synthesis

Chlorosulfone 2-Methyl Isomer

Picture of Chlorosulfone 2-Methyl Isomer
CAT No: SZ-S006010
CAS No: 501120-42-9
Mol.F. : C17H19ClN4O4S
Mol.Wt. : 410.9
Inv. Status: Custom Synthesis
SZ-S006010
CAS No:501120-42-9
Mol.F.: C17H19ClN4O4S
Mol.Wt.: 410.9
Inv. Status: Custom Synthesis

Sildenafil Chlorosulfone Impurity

Picture of Sildenafil Chlorosulfone Impurity
CAT No: SZ-S006011
CAS No: 139756-22-2
Mol.F. : C17H19ClN4O4S
Mol.Wt. : 410.9
Inv. Status: In Stock
SZ-S006011
CAS No:139756-22-2
Mol.F.: C17H19ClN4O4S 
Mol.Wt.: 410.9
Inv. Status: In Stock

Chlorosulfone O-Desethyl Impurit

Picture of Chlorosulfone O-Desethyl Impurit
CAT No: SZ-S006012
CAS No: 139756-27-7
Mol.F. : C15H15ClN4O4S
Mol.Wt. : 382.8
Inv. Status: Custom Synthesis
SZ-S006012
CAS No:139756-27-7
Mol.F.: C15H15ClN4O4S
Mol.Wt.: 382.8
Inv. Status: Custom Synthesis

Des(methylpiperazinyl) Chlorosulfone Impurity

Picture of Des(methylpiperazinyl) Chlorosulfone Impurity
CAT No: SZ-S006013
CAS No: 139756-31-3
Mol.F. : C16H17ClN4O4S
Mol.Wt. : 396.9
Inv. Status: Custom Synthesis
SZ-S006013
CAS No:139756-31-3
Mol.F.: C16H17ClN4O4S
Mol.Wt.: 396.9
Inv. Status: Custom Synthesis

Descarbon Sildenafil

Picture of Descarbon Sildenafil
CAT No: SZ-S006014
CAS No: 466684-88-8
Mol.F. : C20H28N6O4S
Mol.Wt. : 448.5
Inv. Status: Custom Synthesis
SZ-S006014
CAS No:466684-88-8
Mol.F.: C20H28N6O4S
Mol.Wt.: 448.5
Inv. Status: Custom Synthesis

Sildenafil Di-Amide Impurity

Picture of Sildenafil Di-Amide Impurity
CAT No: SZ-S006015
CAS No: 139756-03-9
Mol.F. : C17H22N4O3
Mol.Wt. : 330.4
Inv. Status: In Stock
SZ-S006015
CAS No:139756-03-9
Mol.F.: C17H22N4O3
Mol.Wt.: 330.4
Inv. Status: In Stock

Sildenafil EP Impurity G

Picture of Sildenafil EP Impurity G
CAT No: SZ-S006016
CAS No: 1346602-67-2
Mol.F. : C38H46N10O8S2
Mol.Wt. : 835.0
Inv. Status: In Stock
SZ-S006016
CAS No:1346602-67-2
Mol.F.: C38H46N10O8S2
Mol.Wt.: 835.0
Inv. Status: In Stock

Isobutylpyrazolopyrimidine Impurity

Picture of Isobutylpyrazolopyrimidine Impurity
CAT No: SZ-S006017
CAS No: 1346600-82-5
Mol.F. : C9H12N4
Mol.Wt. : 176.2
Inv. Status: Custom Synthesis
SZ-S006017
CAS No:1346600-82-5
Mol.F.: C9H12N4
Mol.Wt.: 176.2
Inv. Status: Custom Synthesis

Sildenafil Lactam Impurity

Picture of Sildenafil Lactam Impurity
CAT No: SZ-S006018
CAS No: 139756-21-1
Mol.F. : C17H20N4O2
Mol.Wt. : 312.4
Inv. Status: In Stock
SZ-S006018
CAS No:139756-21-1
Mol.F.: C17H20N4O2
Mol.Wt.: 312.4
Inv. Status: In Stock

Sildenafil EP Impurity F

Picture of Sildenafil EP Impurity F
CAT No: SZ-S006019
CAS No: 139755-82-1
Mol.F. : C21H28N6O4S
Mol.Wt. : 460.6
Inv. Status: In Stock
SZ-S006019
CAS No:139755-82-1
Mol.F.: C21H28N6O4S
Mol.Wt.: 460.6
Inv. Status: In Stock

Sildenafil N-Desmethyl Thione Impurity

Picture of Sildenafil N-Desmethyl Thione Impurity
CAT No: SZ-S006020
CAS No: 479073-86-4
Mol.F. : C21H28N6O3S2
Mol.Wt. : 476.6
Inv. Status: Custom Synthesis
SZ-S006020
CAS No:479073-86-4
Mol.F.: C21H28N6O3S2
Mol.Wt.: 476.6
Inv. Status: Custom Synthesis

Sildenafil Impurity 1

Picture of Sildenafil Impurity 1
CAT No: SZ-S006021
CAS No: 501120-38-3
Mol.F. : C17H22N4O3
Mol.Wt. : 330.4
Inv. Status: In Stock
SZ-S006021
CAS No:501120-38-3
Mol.F.: C17H22N4O3
Mol.Wt.: 330.4
Inv. Status: In Stock

Sildenafil Impurity 2

Picture of Sildenafil Impurity 2
CAT No: SZ-S006022
CAS No: 1004455-71-3
Mol.F. : C9H13N3O4
Mol.Wt. : 227.2
Inv. Status: In Stock
SZ-S006022
CAS No:1004455-71-3
Mol.F.: C9H13N3O4
Mol.Wt.: 227.2
Inv. Status: In Stock

Sildenafil Impurity 3

Picture of Sildenafil Impurity 3
CAT No: SZ-S006023
CAS No: 1467610-65-6
Mol.F. : C18H22N4O2
Mol.Wt. : 326.4
Inv. Status: In Stock
SZ-S006023
CAS No:1467610-65-6
Mol.F.: C18H22N4O2
Mol.Wt.: 326.4
Inv. Status: In Stock

Iso Sildenafil

Picture of Iso Sildenafil
CAT No: SZ-S006024
CAS No: 253178-46-0
Mol.F. : C22H30N6O4S
Mol.Wt. : 474.6
Inv. Status: In Stock
SZ-S006024
CAS No:253178-46-0
Mol.F.: C22H30N6O4S
Mol.Wt.: 474.6
Inv. Status: In Stock

Sildenafil Impurity 4

Picture of Sildenafil Impurity 4
CAT No: SZ-S006025
CAS No: 911715-34-9
Mol.F. : C9H14N4O3
Mol.Wt. : 226.2
Inv. Status: In Stock
SZ-S006025
CAS No:911715-34-9
Mol.F.: C9H14N4O3
Mol.Wt.: 226.2
Inv. Status: In Stock

Sildenafil Impurity 5

Picture of Sildenafil Impurity 5
CAT No: SZ-S006026
CAS No: 247583-78-4
Mol.F. : C8H14N4O
Mol.Wt. : 182.2
Inv. Status: In Stock
SZ-S006026
CAS No:247583-78-4
Mol.F.: C8H14N4O
Mol.Wt.: 182.2
Inv. Status: In Stock

Sildenafil Impurity 6

Picture of Sildenafil Impurity 6
CAT No: SZ-S006027
CAS No: 268204-00-8
Mol.F. : C9H16N4O
Mol.Wt. : 196.3
Inv. Status: In Stock
SZ-S006027
CAS No:268204-00-8
Mol.F.: C9H16N4O
Mol.Wt.: 196.3
Inv. Status: In Stock

Sildenafil Impurity 7

Picture of Sildenafil Impurity 7
CAT No: SZ-S006028
CAS No: 247583-72-8
Mol.F. : C8H12N4O3
Mol.Wt. : 212.2
Inv. Status: In Stock
SZ-S006028
CAS No:247583-72-8
Mol.F.: C8H12N4O3
Mol.Wt.: 212.2
Inv. Status: In Stock

Sildenafil Acid Impurity

Picture of Sildenafil Acid Impurity
CAT No: SZ-S006029
CAS No: 139756-00-6
Mol.F. : C8H11N3O4
Mol.Wt. : 213.2
Inv. Status: In Stock
SZ-S006029
CAS No:139756-00-6
Mol.F.: C8H11N3O4
Mol.Wt.: 213.2
Inv. Status: In Stock

Sildenafil Nitroamide

Picture of Sildenafil Nitroamide
CAT No: SZ-S006030
CAS No: 139756-01-7
Mol.F. : C8H12N4O3
Mol.Wt. : 212.2
Inv. Status: Out of Stock
SZ-S006030
CAS No:139756-01-7
Mol.F.: C8H12N4O3
Mol.Wt.: 212.2
Inv. Status: Out of Stock

2-Ethoxybenzoic Acid

Picture of 2-Ethoxybenzoic Acid
CAT No: SZ-S006031
CAS No: 134-11-2
Mol.F. : C9H10O3
Mol.Wt. : 166.2
Inv. Status: In Stock
SZ-S006031
CAS No:134-11-2
Mol.F.: C9H10O3
Mol.Wt.: 166.2
Inv. Status: In Stock

Sildenafil Methyl Sulfonate Ester Impurity

Picture of Sildenafil Methyl Sulfonate Ester Impurity
CAT No: SZ-S006032
CAS No: 2512206-40-3
Mol.F. : C18H22N4O5S
Mol.Wt. : 406.5
Inv. Status: Custom Synthesis
SZ-S006032
CAS No:2512206-40-3
Mol.F.: C18H22N4O5S
Mol.Wt.: 406.5
Inv. Status: Custom Synthesis

Sildenafil Impurity B

Picture of Sildenafil Impurity B
CAT No: SZ-S006034
CAS No: 200575-15-1
Mol.F. : C22H32N6O5S
Mol.Wt. : 492.6
Inv. Status: In Stock
SZ-S006034
CAS No:200575-15-1
Mol.F.: C22H32N6O5S
Mol.Wt.: 492.6
Inv. Status: In Stock

Sildenafil Impurity C

Picture of Sildenafil Impurity C
CAT No: SZ-S006035
CAS No: 139755-95-6
Mol.F. : C21H28N6O4S
Mol.Wt. : 460.6
Inv. Status: Limited Stock
SZ-S006035
CAS No:139755-95-6
Mol.F.: C21H28N6O4S
Mol.Wt.: 460.6
Inv. Status: Limited Stock

Sildenafil Citrate 

Picture of Sildenafil Citrate 
CAT No: SZ-S006036
CAS No: 171599-83-0
Mol.F. : C22H30N6O4S : C6H8O7
Mol.Wt. : 474.6 : 192.1
Inv. Status: In Stock
Rel. CAS No : 139755-83-2 (free base)
SZ-S006036
CAS No:171599-83-0
Mol.F.: C22H30N6O4S : C6H8O7
Mol.Wt.: 474.6 : 192.1
Inv. Status: In Stock
Rel. CAS No : 139755-83-2 (free base)

Sildenafil Impurity 8

Picture of Sildenafil Impurity 8
CAT No: SZ-S006037
CAS No: 139755-98-9
Mol.F. : C23H32N6O4S
Mol.Wt. : 488.6
Inv. Status: Out of Stock, Under Synthesis
SZ-S006037
CAS No:139755-98-9
Mol.F.: C23H32N6O4S
Mol.Wt.: 488.6
Inv. Status: Out of Stock, Under Synthesis

Sildenafil Impurity 9

Picture of Sildenafil Impurity 9
CAT No: SZ-S006038
CAS No: NA
Mol.F. : C22H30N6O5S
Mol.Wt. : 490.6
Inv. Status: Custom Synthesis
SZ-S006038
CAS No:NA
Mol.F.: C22H30N6O5S
Mol.Wt.: 490.6
Inv. Status: Custom Synthesis

N-Desmethyl Sildenafil-N-β-D-Glucuronide

Picture of N-Desmethyl Sildenafil-N-β-D-Glucuronide
CAT No: SZ-S006039
CAS No: NA
Mol.F. : C27H35N6O10S : Na
Mol.Wt. : 635.7 : 23.0
Inv. Status: Custom Synthesis
SZ-S006039
CAS No:NA
Mol.F.: C27H35N6O10S : Na
Mol.Wt.: 635.7 : 23.0
Inv. Status: Custom Synthesis

Sildenafil Impurity 10

Picture of Sildenafil Impurity 10
CAT No: SZ-S006041
CAS No: NA
Mol.F. : C18H21N3O2
Mol.Wt. : 311.4
Inv. Status: Custom Synthesis
SZ-S006041
CAS No:NA
Mol.F.: C18H21N3O2
Mol.Wt.: 311.4
Inv. Status: Custom Synthesis

Stable Isotopes And Metabolites

Sildenafil D5

Picture of Sildenafil D5
CAT No: SZ-S006D01
CAS No: NA
Mol.F. : C22H25D5N6O4S
Mol.Wt. : 479.6
Inv. Status: In Stock
SZ-S006D01
CAS No:NA
Mol.F.: C22H25D5N6O4S
Mol.Wt.: 479.6
Inv. Status: In Stock

Sildenafil D8

Picture of Sildenafil D8
CAT No: SZ-S006D02
CAS No: 951385-68-5
Mol.F. : C22H22D8N6O4S
Mol.Wt. : 482.6
Inv. Status: Limited Stock
SZ-S006D02
CAS No:951385-68-5
Mol.F.: C22H22D8N6O4S
Mol.Wt.: 482.6
Inv. Status: Limited Stock

N-Desmethyl Sildenafil D8

Picture of N-Desmethyl Sildenafil D8
CAT No: SZ-S006D03
CAS No: 1185168-06-2
Mol.F. : C21H20D8N6O4S
Mol.Wt. : 468.6
Inv. Status: Custom Synthesis
SZ-S006D03
CAS No:1185168-06-2
Mol.F.: C21H20D8N6O4S
Mol.Wt.: 468.6
Inv. Status: Custom Synthesis

Homo Sildenafil D5

Picture of Homo Sildenafil D5
CAT No: SZ-S006D04
CAS No: 1216711-61-3
Mol.F. : C23H27D5N6O4S
Mol.Wt. : 493.6
Inv. Status: Custom Synthesis
SZ-S006D04
CAS No:1216711-61-3
Mol.F.: C23H27D5N6O4S
Mol.Wt.: 493.6
Inv. Status: Custom Synthesis

Desmethyl Sildenafil D3

Picture of Desmethyl Sildenafil D3
CAT No: SZ-S006D05
CAS No: 1346603-75-5
Mol.F. : C20H23D3N6O4S
Mol.Wt. : 449.5
Inv. Status: Custom Synthesis
SZ-S006D05
CAS No:1346603-75-5
Mol.F.: C20H23D3N6O4S
Mol.Wt.: 449.5
Inv. Status: Custom Synthesis

Desmethyl Thiosildenafil D8

Picture of Desmethyl Thiosildenafil D8
CAT No: SZ-S006D06
CAS No: 1215321-44-0
Mol.F. : C21H20D8N6O3S2
Mol.Wt. : 484.7
Inv. Status: Custom Synthesis
SZ-S006D06
CAS No:1215321-44-0
Mol.F.: C21H20D8N6O3S2
Mol.Wt.: 484.7
Inv. Status: Custom Synthesis

Sildenafil Citrate 13CD3

Picture of Sildenafil Citrate 13CD3
CAT No: SZ-S006D07
CAS No: NA
Mol.F. : C2113CH27D3N6O4S : C6H8O7
Mol.Wt. : 478.6 : 192.1
Inv. Status: Custom Synthesis
SZ-S006D07
CAS No:NA
Mol.F.: C2113CH27D3N6O4S : C6H8O7
Mol.Wt.: 478.6 : 192.1
Inv. Status: Custom Synthesis

Sildenafil-d3

Picture of Sildenafil-d3
CAT No: SZ-S006D08
CAS No: 1126745-90-1
Mol.F. : C22H27D3N6O4S
Mol.Wt. : 477.6
Inv. Status: In Stock
SZ-S006D08
CAS No:1126745-90-1
Mol.F.: C22H27D3N6O4S
Mol.Wt.: 477.6
Inv. Status: In Stock

Sildenafil Dimer D8

Picture of Sildenafil Dimer D8
CAT No: SZ-S006D09
CAS No: NA
Mol.F. : C38H38D8N10O8S2
Mol.Wt. : 843.0
Inv. Status: In Stock
SZ-S006D09
CAS No:NA
Mol.F.: C38H38D8N10O8S2
Mol.Wt.: 843.0
Inv. Status: In Stock

Possible Nitroso Standards

N-Nitroso Sildenafil

Picture of N-Nitroso Sildenafil
CAT No: SZ-S006040
CAS No: NA
Mol.F. : C22H29N7O5S
Mol.Wt. : 503.6
Inv. Status: Custom Synthesis
SZ-S006040
CAS No:NA
Mol.F.: C22H29N7O5S
Mol.Wt.: 503.6
Inv. Status: Custom Synthesis

N-Nitroso Sildenafil Impurity 1

Picture of N-Nitroso Sildenafil Impurity 1
CAT No: SZ-S006042
CAS No: NA
Mol.F. : C21H27N7O5S
Mol.Wt. : 489.6
Inv. Status: Custom Synthesis
SZ-S006042
CAS No:NA
Mol.F.: C21H27N7O5S
Mol.Wt.: 489.6
Inv. Status: Custom Synthesis

N-Nitroso Sildenafil Impurity 2

Picture of N-Nitroso Sildenafil Impurity 2
CAT No: SZ-S006043
CAS No: NA
Mol.F. : C21H27N7O5S
Mol.Wt. : 489.6
Inv. Status: In Stock
SZ-S006043
CAS No:NA
Mol.F.: C21H27N7O5S
Mol.Wt.: 489.6
Inv. Status: In Stock

N-Nitroso Sildenafil Impurity 3

Picture of N-Nitroso Sildenafil Impurity 3
CAT No: SZ-S006044
CAS No: NA
Mol.F. : C27H35N9O5S2
Mol.Wt. : 629.8
Inv. Status: Custom Synthesis
SZ-S006044
CAS No:NA
Mol.F.: C27H35N9O5S2
Mol.Wt.: 629.8
Inv. Status: Custom Synthesis